Water hardness

GL20 Tewkesbury

Harder than the UK average. Expect visible limescale on kettles and taps.

At 282 ppm, Tewkesbury sits among the UK's hardest water areas — compare it against the softest areas.

Hard 282 ppm South West Wessex Water
Your reading
282
parts per million
Soft
Moderate
Hard
Very hard
0100200300400+

What this means for your home

Based on 282 ppm in Tewkesbury (hard water).

  • Significant limescale buildup in kettles, pipes and boilers
  • Soap scum on shower screens and taps
  • Higher energy bills from scale in heating elements
  • Dry skin and dull hair after washing
  • White residue on dishes and glassware
Heat loss
8%
Moderate scaling
Softener salt
£16–28
per year
Worth it?
Yes
at 282 ppm
Suggested for hard water
Whole-house water softener
Best long-term protection for boilers and pipes.
From £600 installed
Shower head filter
A simple first step for limescale on tiles and glass.
From £25
Filter jug or under-sink
Improves taste and reduces kettle scale.
From £20
Softening

Should you soften the water in Tewkesbury?

A verdict and running-cost estimate based on GL20's 282 ppm reading, for a typical 4-person household.

Softener recommended

Water is hard to very hard, so appliance, scale and soap savings typically pay back a softener within a few years.

Recommended size
24k
grain capacity, regenerates ~every 9.5 days
Salt running cost
£16–28
per year (~58 kg salt)
Limescale
8%
est. heater efficiency loss. Moderate scaling
Soap saving
Moderate
Noticeable saving: soaps lather more easily, cutting detergent use.

Appliance impact at 282 ppm: noticeable: boiler/dishwasher life cut without descaling. Sized for a 4-person home; regenerates roughly every 9 days (estimate). Figures are conservative estimates and vary with household size and usage.

Water quality details

Hardness data for GL20

Sourced from Wessex Water's published water-quality reports and public records.

Hardness measurements

Parts per million (ppm CaCO₃)282
Degrees Clark (°Clark)19.7
Degrees French (°fH)28.2
Degrees German (°dH)15.8
Calcium (mg/L Ca²⁺)113

Supplier and area

Water supplier Wessex Water
Region South West
County Gloucestershire
Hardness band Hard
UK average 207 ppm
Visit Wessex Water page
Official source
Wessex Water water-hardness report

Read the hardness and limescale guidance here, then use the postcode checker to see your local hardness value.

Nearby

Other areas near Tewkesbury

GL19
Gloucester
258ppm
Hard
FAQ

Common questions about GL20

What is the water hardness in GL20 Tewkesbury?
The water in GL20 Tewkesbury has a hardness level of 282 ppm (parts per million) calcium carbonate, classified as hard. This is 75 ppm above the UK national average of 207 ppm.
Which water company supplies GL20?
GL20 Tewkesbury is supplied by Wessex Water. Wessex Water serves the South West region.
Is the water in GL20 safe to drink?
Yes. Hard water at 282 ppm is safe to drink. Water hardness affects taste and can cause limescale, but it is not a health risk. In fact, hard water contains beneficial minerals like calcium and magnesium.
How can I reduce water hardness in GL20?
For hard water at 282 ppm, a whole-house water softener is the most effective solution. You can also use a jug filter for drinking water, descaling products for appliances, and a shower filter for better skin and hair.
What does 282 ppm water hardness mean?
282 ppm means there are 282 parts per million of calcium carbonate dissolved in the water. This is equivalent to 19.7 Clark degrees, 15.8 German degrees, or 28.2 French degrees. Water above 180 ppm is generally considered hard.
What size water softener do I need in GL20?
For a typical 4-person home at 282 ppm, a 24,000 grain softener is a sensible size. It would regenerate roughly every 9.5 days. Larger households or higher daily use need a bigger unit. These figures are conservative estimates.
How much does it cost to run a water softener in GL20?
At 282 ppm, expect to use about 58 kg of salt a year, costing roughly £16–£28/year. Water is hard to very hard, so appliance, scale and soap savings typically pay back a softener within a few years.

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